Assiguou to allis-chalmehs mabttji ac



P. C. VAN ZANDT.

ROLL CRUSHER.

APPLICATION FILED SEPT-20| 1915.

l Patent-ed July 15, 1919.

@WN/M -the roll, such BAUL C. VAN ZANIDT, 0F CHICAGO,

ILLINOIS, ASSIGNOB T0 ALLIS-CHALMERS MANUFAC- DELW.

BOLL-CBUSHER.

Specication of Letters Patent.

Patented July 15, 1919.,

Application led September 20, 1915. Serial No. 52,123.

l To all whom it may concern:

Be it known that I, PAUL C.' VAN ZANDT, a citizen of the United Statesof America, residing at River Forest, Chicago, in the county of Cook andState of Illinois, have invented a certain new and useful Improvement inRoll-Crushers, of which the followin@ is a specification.

his invention relates to improvements in the construction ofcrushing'devices and is particularly applicable to that class ofcrushing devices known as roll crushers..

An object of the invention is to provide a roll crusher which is simplein construction and eflicient in operation. One of the more specificobjects is to provide a roll crusher of maximum capacity;

. The invention consists primarily in forming at least one roll ofeither a single or a multiple roll crusher, with projections or knobs ofdiferent heights, the purpose o such formation of the projectionsbeingto cause large pieces of rock to be tumbled over from one end ofthe roll to the other, thereby preventing lodging of the rock in a setposition and grooving instead of. fracturing thereof by the projections.While the present disclosure shows the invention as applied to a singleroll crusher, it will be apparent: that the same is applicable to othertypes of' roll Crushers. The present disclosure also shows theprojections arranged'in regular straight rows extending longitudinallyof disclosure having been selected merely as being a Simple embodimentof the invention. l

Several of the novel features of single roll crushing construction whichare disclosed herein, lform no part of the present invention.

A clear conception of an embodiment of the invention may be had byreferring to the drawing accompanying and forming a part of thisspecification in which like reference characters designate the same orsimilar parts in the various views.

AFigure 1 is an end view of a crushing roll constructedin accordancewith the present invention. v

Fig. 2 is van elevation of the crushing roll disclosed in Fig. 1.

Fig. 3 is va transverse vertical section through one form of crusher`having the present invention appliedlthereto, the section throughj theroll being taken along the line is supporte hand Slugger plates 3, 4,.5, has a number of projections 15.formed III- III of Fig. 2looking inthe direction of the arrows.

The roll crusher, see Fig. 3, comprises a crushing roll 18, and an anvil17 spaced therefrom to form an intermediate or direct crushing member.The crushing roll 18 is mounted u o n the main roll shaft 1 which insuitable bearings, not shown, in the main frame 20. rhe'anvil 17 issupported at its upper extremity from the supporting shaft 21 which isalso mounted*` in the main frame 20. The lower extremity of the anvil 17engages a reaction rod 25 which is connected with a plurality 4ofreaction s rings 23 by means of suitable tension de vices 24. Thearrangement of the anvil 17, springs 23, and devices 24 is such that ifan unduly hard piece' of material enters the direct crushing chamber,the lower extremity of the anvil 17 'will automatically recede f 'fromthe roll 18 and will prevent the hard material from breaking the crusherelements.

The feed hopper 19 is located above the crusher elements and directs thematerial toward the upper portion of the roll 18 and of the intermediatecrushing chamber. The crushed material is delivered from the machine atthe lower extremity of the anvil 17. The ioll 18 is given a rotarymotion by means of power applied at the driving pulley 22. The pulley 22is mounted upon the main driving shaft 26 which is geared or otherwisedrivingly connected to the main roll shaft 1.v

Referring specifically to Figs. 1 and 2, the roll 18 comprises anoctagonal core 2 and 'a circumferential series of roll plates 3, 4, 5,

forming a shell for the core 2. The roll core 2 is lixed to the mainshaft 1 by means of any suitable securing device, such as a key 6. Theperiphery of the core 2 is provided with a series of longitudinal ribs16 which engage similarly shaped recesses in the lates 3, 4 and 5.

T e roll plates may be divided into three classes, namely, theordinaryroll plates 3, the right hand slugger plates 4, and the left 5. Each ofthe plates thereon. 'Ihe'plates 3 are provided only with projections 15.The right hand Slugger plates4, in addition to having projectionsflformed thereon, are provided with Slugger projections or knobs 7, 8, 9,10. rlhe left hand Slugger plates 5, in addition to having'projections15 formed thereon, are provided With slugger projections or knobs 11,12, 13, 14. In order to -readily define the knobs of the slugger plates,the knobs 7, 11, will be designated as the lowest; the knobs S, 12, willbe designated as the second lowest; the knobs 9, 13, will be designatedas the second highest; and the knobs 10, 14, will located adjacent thehighest knobs 10, 14, re-

spectively.

During the normal operatlon of the Crusher, the roll is rotated in ananticlockwise direction as viewed in Fig. 3, by means of power appliedat the pulley'22. The material to be crushed, which generally variesconsiderably in size, is admltted either continuously or intermittentlyto the feed hopper 19. The relatively small pieces ofthe charge passreadily through the hopper 19` yand the crushing; chamber formed betweenthe anvil 17 and the roll 18, being properly reduced during theirdownward passage and eventually discharged from the machine. 'Iherelatively large pieces of material contained in the charge will not,however, enter the direct crushing chamber and illust first be brokeninto fragments by the slugging action of the knobs formed on the roll18. As the Slugger knobs successively approach the large pieces ofmaterial they deliver sharp blows thereagainst and eventually break thepieces into fragments' which are suliciently small to pass into thechamber adjacent the anvil 17.

If the material operated upon is relatively soft or porousin its nature,thel large pieces will tend to lodge infa set'position at the.

mouth of the direct crushing chamber and the roll projections will notreadily break the same into smaller fragments. In order to prevent thisundesirable action, the roll 18'is provided with the slug er knobs ofdifferent heights. These kno will tend to tumble or roll the largepieces of material from one end of the roll 18 to the other and to itudinally arranged prevent lodging thereof in a set position untilgrooving occurs. By this means the large pieces of material are readilybroken into small fragments of a size permitting passage thereof intothe direct crushing chamber.

It will thus be noted that thel Slugger knobs of different heights, dueto their action in preventing lodging of the material in the mouth ofthe crushing chamber, greatly e11- hance the capacity of the crusher andell'ectively prevent stalling of the machine. The removability'of theplates 3, 4, 5, permits renewal of any one or more of these plateswithout necessitating removal of the others. The arrangement of theknobs in straight rows extending longitudinally of the roll, alsosomewhat simplifies the construction of the plates and reduces the costof construction of the machine, to a minimum.

It should be understood that it is not desired to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,`.

1. In a Crusher, a roll having an axis and a plurality of longitudinallyarranged series of projections, each series comprising at least threeprojections of successively increasing heights, and the bases of saidprojections being at the same distance from said axis.

2. In a Crusher, a roll having a plurality of longitudinally arrangedseries of projections, each series comprising at least three projectionsof different heights, and the low projections of one series beingarranged circumferentially inline with higher p-rojectionsof anotherseries.

3. In a Crusher, a roll having two longiprojections of one seriesalternating with those of the other, one series comprising projectionsof different heights and the other comprising projections of equalheights.

4. In a Crusher, a roll having two longitudinally arranged,substantially alined series of projections, the projections of oneseries alternating with those of the other, one series comprisingAprojections of successively increasing heights and'the'other comprisingprojections of equal heights.-

In testimony whereof, the signature of the inventor is aiixed hereto.

PAUL c. VAN zANDT.

series of projections, the

